15401397 has 16 divisors (see below), whose sum is σ = 22675968. Its totient is φ = 9220080.

The previous prime is 15401387. The next prime is 15401431. The reversal of 15401397 is 79310451.

15401397 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 15401397 - 2⁶ = 15401333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15401317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73 + ... + 5550.

It is an arithmetic number, because the mean of its divisors is an integer number (1417248).

Almost surely, 2^15401397 is an apocalyptic number.

It is an amenable number.

15401397 is a deficient number, since it is larger than the sum of its proper divisors (7274571).

15401397 is a wasteful number, since it uses less digits than its factorization.

15401397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5720.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 15401397 is about 3924.4613643149. The cubic root of 15401397 is about 248.8017163080.

The spelling of 15401397 in words is "fifteen million, four hundred one thousand, three hundred ninety-seven".